Thermostatic burner control



Nov. 16 1926. H. J.' LONG THEaMosTATIc BURNER CONTROL FiledAugusi'I 13J 1923 Patented Nov. 16, 1926.

UNITED STATES PATENT OFFICE.

HERBERT J. LONG, or NEW BRUNSWICK. NEW JERSEY, AssIGNon To THE xomrax co., or NEW BRUNSWICK, NEW JERSEY.

THERMOSTATIC BURNER CONTROL.

Application led August 13, 1923. Serial No. 657,082.

My invention pertains to a thermost-atic burner control and more particularly to a construction in which the burner proper which is supplied with flame orifices itself constitutes one of the co-acting elements of the thermostatic mechanism whereby the4 latter functionates to close a valve and cut off the Supply of fuel in the burner construction whenever the burner is not ignited.

This application comprises subject matterl divided from my parent application entitled Emergency fuel valve control appliance issued September 4, 1923), 1,467,049, together. with minor details of construction which for some purposes may be considered as improvements. The underlying principle of operationA is the `same as that originally shown, described and claimed in my earlier application above identified.

The drawings exemplify a thermostatic burner control adapted for employment as a pilot burner in a hot waterfheater. A- brass -carries a valve adapted to cooperate with said seat. The rod is composed of metal vhaving a lesser coeicient of expansion than thatof the Monel tube and its normal position with reference to the latter is controlled by an adjusting vagencyl carried by the closed upper end of the Monel tube. Ordinarily, when the pilot burner is not ignited the valve will be closed, but when the parts are subjected to the heat of the pilot flame the Monel tube will expand andhold the valve "raised from its seat. The rod may also be manually lifted from its seat against the action .of a spring. Just above the ame orifices I t a sleeve provided with a flange in-iy tended to serve the function' ofa baille to prevent' the formation of carbon.

Adverting to the drawings: Figure I 1s an elevation of a thermostatic burner control embodying my invention the same being shown in connection with a gas supply pipe.

as Patent No.

Figure II is mainly a longitudinal section of Figure I with the valve held open by flames.

Figure III is a View corresponding to Figure II showing the valve closed.

Figure IV isa longitudinal section of a mod'fication corresponding with the form sho n in Figure I of my parent application.

Figure V illustrates another modification corresponding to Figure X of my par-V ent application.

Figure VI is a further modification corresponding with Figure V of my parent application.

Figure VII is still another modification showing the principle of my invention applied to a different type of burner.

Figure yVIII illustrates a modification showing a nozzle torch in combination with my thermostatic burner.

I am familiar with the disclosures of the following prior patents: McCormick No.` 269.083 of December 12, 1882, Franke'No..

581,707 of May 4, 1897, Oeklke No. 643,363 of February 13, 1900, and Yockey et al'No. 895.136 of August 4, 1908.

The form of my invention shown in Fig ures I to III inclusive is adapted and has for some years been successfully used as the pilot burner of a hot water heater. Its structure includes a brass tube 1 connected with a gas supply pipe 2 by means of a union 3. The tube 1 is fashioned interiorly with a valve seat 4 whereas its upper end is' in,threaded connection at 5 with a tube 6 composed of Monel metal and provided intermediately of its ends with five circumfer-l entially arranged ports 7 in which are fitted spuds 8. vThe spuds 8 are brass or some other metal which has less affinity for carbon than has Monel metal." Aluminum or lava spudsqnight beemployed instead of the brass spuds. vThe top of theMonel tube is provided with a, single centrally located aperture 9 in whichis slidable an adjusting rod 10 carrying at itsupper end a rin 11. Interiorly of the tube 6 the lower end lo the rod 10 carries a nut 12 for controlling the compression o f a spring 13 which surrounds the rod 10 between the nut 12 and the upper end of the tube 6. An adjusting nut 14 cooperates with the ro'd 10 outside of the tube lll 6 so that the expansionofthe tube will variwith lower end a valve 16 adapted to fit the seat- 4 and normally held thereagainst by the action of the spring 13 whereby passage of gas through the pilot burner -is prevented. The purpose of the ring 11 is to facilitate manual lifting of the rod and hence of the valve 16 from its seat against the action of the spring 13 so as to let gas escape from the ports or flame orifices 7 preparatory to igniting it and so that its flames as shown in Figure II will heat the burner. cause the Monel tube 6 to expand and thereby continue to hold the valve 16 open.

f Fitted around the tube 6 is a brass collar 17 provided at its lower end with a flange 18 located just above the spuds 8 and adapted/to act as a baffle to carry the tips of the white fiames away from the metal and incidentally to prevent extinguishment of the flames under strong updraft.

The pilot burner is normally closed as shown in Figure III but when ignited its valve 16 is held in its open position. If the pilot burner for any reason becomes extinguished, the Monel tube 6 upon cooling contracts to move the rod downwardly and press the valve 16 against its seat. The sev,

eral adjustments afforded seating.r of the valve 16.

In the modification shown in 'Figure IV a T 19 to which gas is supplied is fashioned a valve seat 20 enclosed by a tube 21 fashioned near its top with orifices 22. Detachably connected with the upper vend of the tube 21 is another expansible tube 23 provided at its top with a cap 24 with which permit the proper -a stem 25 has threaded connectionat 26.

The lower end of the stem 25 carries a needle valve 27 adapted, when the pilot burner is cold to close the outlet of the T 19.

Figure V illustrates a further modification in which a single eXpansible tube 28 has flame orifices 29 and in screw threaded connection with it at its top a plug 30 through which a stem'31 passes for slidable movement. The lower end of the stern is fashloned as a needle point 32 adapted normally to close the upper end of the bore 33 in a nipple 34 in response to the action of the spring 35.

y Figure; VI shows a gas supply pipe 36 with which a hollow structure 37 is detachably connected. The upper end of the structure 37 is' provided with flame orifices 38 and'just below with a partition 39 fashioned with al central port 40 adapted to be opened or closed according to the position of a stem 41 having itswupper end fashioned as a needle point 42 and movable in a lguide 343 in response to the action of a spring 44 which 'surrounds its lower endand a: collar 45. AWhen the hollow structure 37 tends to press up.-

expands the portv 40 will be carried up beyond the upper limit of the range of movement of the needle point 42.

Figure VII illustrates a horizontal type of burner provided with a gas inlet 46 leading to a chamber 47 having on one side va valve port 48 and on its other side astufling box 49 through which latter a needle pointed` steel rod 50 projects for cooperation with the port 48. The chamber 47 communicates through the port 48 when open with another chamber 51 which is connected with a burner 52 having gas outlet ports 53 and at its further end having a depending extension 54 with which the opposite end of the steel rod has a slidable adjustable connection at 55. The burner 52 may be of any material because, when gas issuing from the ports 53 is ignited, it will always be very much hotter than the lrod 50 in consequence of which it will expand enough to withdraw the valve extremity of the rod 50 from the port 48.

Figure VIII shows the application of the l principle of connecting with a gas supply pipe-59, a nozzle torch 62a according to the showing of Figure III in cation, with the additional showing of a my parent applipush button valve73 for controlling the communication through the pipe 59. It will be observed that the mouth of the torch is directed toward the pilot burner so that when gas issuing from the torch is ignited it will soon heat the pilot thermostat sufficiently yto open the pilot burner. of the thermostatic pilot burner is like that shown in Figure IV to include a 60 and push button valve 73, a coupling 61, a gas line 71, a seat 62 enclosed by a tube 63 having orifices 64 and above another tube 65 provided with a cap 66 through which passes an adjustable stem-68 provided with a squared end 67 and surrounded by an adjusting nut 70. The lower end of the stem 68 carries a needle valve 69.

LA gas burner comprising a tube provided with an inlet, and a flame orifice, a composite rod structure projecting into said tube and having one part adapted to close said inlet, a spring normally tendingto move said rod structure toward the inlet capable of being closed thereby, means for limiting such movement of said rod structure, said rod structure extending outvof said tube to enable its manipulation against the action'of said spring to'open said inlet, said tube and,

The general form valve casing lll) Leonesa f valve adapted to fit said seat, a spring norgenerated, so long as gas issuing from said orifice is lit, willcause said valve to be held ofi" of said seat and thus` insure the flow of gas.

3. A. thermostatic gas burner comprisingv a hollow. structure provided with a valve seat and a flame orifice and adapted to-expand in response to the heat Jfrom a flame at its orifice, a valve devicecarried by and having a lesser coeiicient of expansion than said structure such that a 'relative diiit'erentlal action occurs in response to changes in temperature whereby to control the iow of fuel past said valve, and a baie carried by said hollow7 member' inu proximity to said orifice.

4. A gas burner comprising a tube provided with an inlet and a liame orifice and furthermore fashioned interiorlyl with a Valve seat, a valve stem projecting into said tube and carrying interiorly a valve adapted to cooperate' with said seat and a nut adjustably carried by an exterior portion yof said stem, said tube having a greater coeficient of expansion than said stem whereby applied heat will cause said tube to raise said nut and 'hold said valve off-of'its seat.

5. A gas burner comprising a hollow structure provided-With an inlet and a flame oriice and furthermore fashioned interiorly with a valve seat, a valve structure projecting into said hollow structure and adapted to cooperate with said seat and a nut adjustably carried by an exterior portion of said valve structure, said hollow structure having a. greater coeiicient of expansion than said valve structurawh-ereby applied heat will cause said hollow structure to expand and press against said nutand hold said -valve structure off of its'seat.

signed bym-this 17th day of Juiy, 192s-,

HERBERT J. LONG. 

